METHOD FOR DISSOLVING BATTERY POWDER IN HYDROCHLORIC ACID
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United States of America Patent
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Aug 8, 2024
app pub date -
Sep 29, 2022
filing date -
Sep 30, 2021
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Abstract
The method for dissolving battery powder in hydrochloric acid according to the present invention includes: stirring battery powder containing valuable metals obtained from waste lithium batteries in hydrochloric acid with a concentration of 50 to 150 g/L at a mass ratio of 250 to 1000% relative to hydrogen chloride in the hydrochloric acid to provide a hydrochloric acid suspension of the battery powder; and adding a predetermined amount of hydrochloric acid to the hydrochloric acid suspension to set the concentration of hydrochloric acid in the hydrochloric acid suspension to 150 to 350 g/L, and then adjusting and stirring the hydrochloric acid suspension such that the proportion of battery powder in the hydrochloric acid suspension to a mass ratio of 50 to 200% relative to hydrogen chloride in the hydrochloric acid suspension to provide a hydrochloric acid solution of the battery powder.
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